Cannot connect through router - McAfee issue?

I have been unable to connect to the Internet via the router. I'm not sure if it's related to a McAfee update or not. I updated McAfee Security Center earlier today. Things seem to work until early this evening when another family member wanted to access the Internet via the wireless connection. It wouldn't work so I rebooted the Lynksys wireless-G router. Then I couldn't even connect even though I have a wired connection.

 

I can't figure out what's wrong. If I disconnect the modem from the router and connect it directly to my computer, then I can access the Internet.

 

Also, I have a network printer and am able to access it via the router. Can anyone help?

 

Here is the results of an IP config:

 

Windows IP Configuration

        Host Name . . . . . . . . . . . . : XXXDELL
        Primary Dns Suffix  . . . . . . . :
        Node Type . . . . . . . . . . . . : Hybrid
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : Intel(R) PRO/100 VE Network Connecti
on
        Physical Address. . . . . . . . . : 00-13-72-C1-F8-AC
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 192.168.1.100
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.1.1
        DHCP Server . . . . . . . . . . . : 192.168.1.1
        DNS Servers . . . . . . . . . . . : 192.168.1.1
        Lease Obtained. . . . . . . . . . : Wednesday, March 21, 2007 1:43:22 AM

        Lease Expires . . . . . . . . . . : Wednesday, March 21, 2007 1:48:22 AM

 

Computer is a Dell Dimension 5510 with Win XP

As I said, today I did a McAfee update and things have deteriorated. I tried turning off the firewall and still can't access the network via the router.

 

I run Norton ghost and am seriously thinking about restoring to a point from yesterday. I've already spent hours on this issue and can't seem to resolve it.